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Generalization of the 1993–2013 data on a chemical composition of bog waters in the taiga zone of Western Siberia is executed. More than thirty bogs (mainly outside of zones of active anthropogenous influence) located basically in the territory of Tomsk oblast, in part – in Khanty-Mansi Autonomous Okrug and Novosibirsk oblast, including sites of the Vasyugan Mire, were researched. The common reduction of contents of the dissolved salts from the south – a southwest on the north – northeast is observed in process of increase of a water runoff and a share of upper (oligotrophic) bogs in bogginess of river basins. On this background the increase in concentration of the majority of the investigated substances is marked: 1) from watersheds to valleys; 2) on sites with prevailing of forest-fen peat deposit in comparison with forest and fen. In a vertical section of a peat deposit the lowered contents of dissolved salts in active (upper) horizon and increased contents in the inert horizon are fixed. Many factors of spatial changes of a chemical composition of bog waters are biogeochemical conditions, intensity of water exchange, a ratio of an atmospheric and ground water and mineral feed. These factors regulate geobotanical conditions, interaction time of water with fi rm particles, conditions of accumulating and carrying out of transformation products of organic substance.

Geochemical Parameters of Bog Waters in the Taiga Zone of the Western Siberia